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Judgments and critical accounting estimates - Additional Information (Detail) - SEK (kr) kr in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of accounting judgements and estimates [line items] |  |  |
Write-downs for intangible assets and goodwill | kr (15,333.0) | kr (31,916.0) | kr (61.0)
Goodwill | 56,077.0 | 52,944.0 |
Provisions | 11,715.0 | 11,706.0 | kr 11,588.0
Contingent liabilities | 3,559.0 | 3,037.0 |
Defined benefit obligation (DBO) | kr 86,598.0 | kr 85,535.0 |
Reversal Of Inventory Write down Percentage Of Total Inventory | 7.00% | 2.00% |
Reversal of inventory write-down | kr 2.0 | kr 0.8 |
Carrying amount of contract liabilities | 41,229.0 | 34,416.0 |
Fair value of plan assets | kr 64,359.0 | kr 62,593.0 |
Inventory written down as a percentage of total inventory | 11.00% | 10.00% |
Inventory write down | kr 3,329.0 | kr 3,994.0 |
Deferred tax assets | 24,412.0 | 22,375.0 |
Intellectual property rights brands and other intangible assets [member] |  |  |
Disclosure of accounting judgements and estimates [line items] |  |  |
Intangible assets and goodwill | kr 64,000.0 | kr 75,600.0 |

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- Definition The amount of an entity’s obligation to transfer goods or services to a customer for which the entity has received consideration (or the amount is due) from the customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 105 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_105&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 116 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_116_a&doctype=Standard -URIDate 2024-03-27 + Details
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